A Turn table with a ball that rotates with an arrow on top is projected on a screen by a arc lamp with a pendulum above. See TPT 2(2), 79.

1D10.60

Measuring Angular Velocity of a Fan

Use an electronic strobe to measure the angular velocity of a fan blade or other rotating objects.

1D15. Velocity, Position, and Acceleration

PIRA #

Demonstration Name

Abstract

1D15.10

Ultrasonic Detector and Students

Have a student walk toward and away from a sonic ranger while observing plots of position, velocity, and acceleration.

1D15.15

Kick a Moving Ball

Kick a moving soccer ball on the floor or hit a moving croquet ball on the lecture bench with a mallet.

1D15.20

High Road Low Road

Two objects start at the same velocity, one moves straight to the finish, the other traverses a valley. The problem: which one wins?

1D15.30

Catching the Train

A ball accelerating down an incline catches and passes a ball moving at constant velocity on a horizontal track.

1D15.35

Passing the Train

A ball accelerates down an incline with a stripped rope moving at constant velocity in the background. The moment the ball has the same velocity as the rope is strikingly obvious. Repeat with the rope at a different constant velocity.

1D15.40

Galileo's Circle

Several rods are mounted as cords of a large circle with one end of each rod top center. Beads released simultaneously at the top all reach the ends the rods at the same time. See Sutton M-93.

1D15.45

Brachistochrone Track

Three tracks - straight line, parabola, and cycloid are mounted together. Triggers at each end control a timer. See Sutton M-88 and M-89.

1D40. Motion of the Center of Mass

PIRA #

Demonstration Name

Abstract

1D40.10

Styrofoam with Light

An odd shaped piece of Styrofoam with a light placed at the center of gravity is tossed in the air.

1D40.11

Center of Mass Disc

Throw a disc with uniform distribution and then offset the center of mass.

1D40.12

Hammer Toss

Mark the center of gravity of a hammer with a white spot. Throw it in the air and attach it to a hand drill to show it rotating smoothly.

A pendulum support is free to move on rollers as the pendulum swings back and forth. See TPT 2(1), 33.

1D40.55

Air Track Inchworm

The center of mass of two carts coupled with leaf springs is marked with a light or flag. Show oscillation about the center of mass or constant velocity of center of mass. See University of Minnesota demo website.

This model shows the forces involved when a vehicle transverses a steep embankment.

1D50.61

Banked Track w/ball

A steel ball rolled down an incline into a funnel reaches an equilibrium level where it revolves in a horizontal plane.

1D50.65

Rotating Plate

A turntable can be rotated at various angular frequencies. Objects can be placed at different radii. [A small platform (needs to be made) can be attached which will swing out to the correct slope for any angular velocity. A device for measuring force is also shown.]

1D60. Projectile Motion

The CENCO ballistic cart is equipped with a spring loaded vertical ball launcher. The ball is launched vertically into the air when a pin is pulled out by a string that is attached to a clamp on the table. The cart and ball move at constant velocity. The cart catches the ball some time later after the cart has gone underneath a bridge and the ball when over the bridge.

1D60.10

PASCO Ballistic Cart with Launcher

Cart moves on a track, inclined or level. It launches an ball upward.

1D60.11

Instructor on a Cart

Instructor sits on a rolling cart and throws a ball upward.

1D60.15

Ballistic Cart Goes Under a Bridge on an Incline

The same demo as 1D60.11 except the cart is moving on an incline.

1D60.15

Ballistic Cart on Incline

Some strobe pictures and drawings show the ball is always above the cart relative to the incline, but not always above the cart relative to the horizontal.

This is the Pasco's version of "Shot the Target". A target (in this case a stuffed monkey) is released about 2 meters above the table top as soon as a projectile (a Ball) is fired. The ball then hits the target in midair as long as the system is properly alined.

1D60.31

Monkey Hunter on an Inclined Table

A simple and effective version using rolling balls on an inclined table.

1D60.35

Monkey Hunter (Monkey's Reference Frame)

Viewed from the free monkey frame, the projectile moves uniformly. Placing the hunter below the monkey can mislead students.

Four launching ramps are mounted to a large magnetic surfaced coordinate system. Magnet based metal hoops can be repositioned easily so the ball passes through all the hoops. Looks very nice.

1D60.55

Parabolic Trajectory on Incline

A tennis ball covered with chalk dust is rolled across a tilted blackboard.

1D60.55

Air Table Parabolas

Pucks are projected across a tilted air table.

1D60.56

Parabolic Trajectory - Ski Jump

Apparatus for plotting parabolic trajectory by rolling balls down a ramp and launching them off a jump. There landing points can be plotted on carbon paper.

1D60.58

Parabolic Trajectory

A strobe picture is taken of the projectile motion of a golf ball. A method of analysis suited for a HS class is presented.

1D60.60

Adjustable Parabolic Form

Plumb bobs of lengths proportional to the square of their distance from the pivot point (1, 4, 9, 16, 25, 36, etc.) are hung from an arm with an adjustable angle. The bobs show the position of a projectile at equal time intervals which is launched from the pivot point with an initial angle equal to the angle of the main support arm.

1D60.65

Parabolic Trajectory - Water Stream

Apparatus Drawings Project No.33: The adjustable water nozzle has an arm extending in the direction of the nozzle with hanging arrows at intervals along the arm. Adjust the water pressure so the stream matches the arrow heads.

1D60.65

Water Trough Trajectory

Hook a nozzle to the house water through an additional regulator to reduce pressure fluctuations. Shoot at varying angles into a water trough.